Fits for cellphones with a usb socket(can charge all cell phones with your own USB cable)
Support replacement of 18650 Li-battery. Easy to use and secure
Can install 6 X 18650 battery (battery is not included, and you need to weld the batteries and the PCB board yourself)
Can also be used as Battery charger for 18650 batteries
Function: power bank and rechargeable 18650 battery charger,also can be used as flashlight for emergency.

Let your heart be your guide with Charge HR. Monitor heart rate automatically and continuously right on your wrist
Take control of your goals using Charge HR to record workouts and track all-day activity
With a comfortable fit and Caller ID, Charge HR lets you stay connected in style. Use Exercise Mode to easily record workouts, see real-time exercise stats and have summaries automatically appear on your Fitbit dashboard
Get a better picture of your overall health by using Charge HR to automatically track how long and how well you sleep
1 year Manufacturer Warranty from the date of purchase

GSM quad band*, Send and receive SMS
Store up to 200 SMS messages on the FW200L base, messages can also be stored on the SIM card**
Battery back up (long rechargeable battery life), 1000 name and number phonebook in the FW200L base,contacts can also be stored on the SIM card**
2.2″ black and white backlit display (128×64), Hands-free speakerphone
Ringer melodies (user selectable), 20 name and number Caller ID list, 20 redial memory